WAC 296-826-40020   Nonrefrigerated systems.  

     You must:

     • Make sure piping on nonrefrigerated systems is:

     – ASTM A-53-2004 Electrical Resistance Welded and Electric Flash Welded Pipe or equal. In addition piping needs to be:

     ▪ At least schedule 80 when joints are threaded.

     ▪ At least schedule 40 when joints are either welded or welded and flanged.

     • Prohibit the use of piping or tubing made of any of the following:

     – Brass

     – Copper

     – Galvanized steel.



[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. 06-10-067, § 296-826-40020, filed 5/2/06, effective 9/1/06.]